The Lymphatic System

Question 1

What is the lymphatic system?

Answer 1

A secondary transport system. A one-way system of dead-ending vessels and lymph nodes

Question 2

What are lymph nodes?

Answer 2

Swellings in lymph vessels

Question 3

What is the function of lymph nodes?

Answer 3

Lymph nodes help fight infections

Question 4

How do lymph nodes fight infections?

Answer 4

• Filter bacteria from lymph as it passes through
• Store lymphocytes (WBCs), some kill micro-organisms and others produce antibodies

Question 5

What is tissue fluid (extra cellular fluid)?

Answer 5

Plasma without RBCs, platelets or large proteins with less WBCs. It surrounds all body cells and helps transport materials in and out of cells

Question 6

What is the fluid in the lymphatic system called?

Answer 6

Lymph

Question 7

How does lymph move in lymph vessels?

Answer 7

• Muscles in vessel walls
• General body movements

Question 8

How is the direction of lymph flow controlled?

Answer 8

Valves

Question 9

Where do smaller lymph vessels join to?

Answer 9

The thoracic duct and the right lymphatic duct. These are subclavian valves

Question 10

What are functions of the lymphatic system?

Answer 10

• To defend against against infection
• To transport fat